Printable Hard Sudoku

Set j2jyxi. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
4 6 8
1 2 8 9
8 9 7 5
9 8 1
1 3 2 4
2 6 4 3
7
3 6 8
4 5 2
Hard #2
8 2
7 3 4 6
1 9 5
7 6
3 6 9 7
9 5 6 8
7 3 8 5 4
2 8 3 5
7
Hard #3
1 9
8
1 9 6 5
6 5 7 1 4
2 4 6
8 2 5
5 2 4 3 7
4 8 3
6 9 2
Hard #4
8 1 6
2
3 2
9 1 5 6 4 7 8
4 7 9 8 1
2
8 1 3 5 4
6
7 4 1 3
Hard #5
2 8
7 3 1 2
4 8 9 3
6 3 4 5
5 9 6 2
8 1
5 3 6
7 3 1 8
1 9
Hard #6
3 5
8 4 9 5
9 8 1 7 2 6
7 9 8
5 6 9 2
2 8
3 4
5 1
2 8 1 5
Hard #7
9
7 9 6 4 8
3 6 4 7 5
1 8 5 9
8
7 3 6
2
1 5 3 9 6
9 7 2 4
Hard #8
2 9 5 8
8 1
5 8 4 2
9 2 4 5
2 3
8 4 1 9
5 6 4 3
3 1
9 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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